System and method of data caching for compliance storage systems with keyword query based access

摘要

A method of data caching for compliance and storage systems that provide keyword search query based access to documents computes a value for each data document based on a document information-retrieval relevancy metric for user keyword queries and a recency, frequency of each query. The values are adapted to changing query frequencies and popularities. Then selecting and evicting documents from a cache can be based on the values according to a knapsack solution. A weight is computed for each query such that recent, more frequent queries get a higher weight. A information-retrieval metric is used for measuring a relevancy of a document for a query. A weighted sum is taken of the information-retrieval metric times a query weight over all queries.